MacOS Mojave saw one of the biggest changes to the macOS interface in several years, so if you’re still using High Sierra, upgrading to Catalina will allow you to use features like Dark Mode, which changes the look of your Mac and all applications that support it so that they display light text on a dark background. It’s very rare that anything goes wrong when you upgrade, but it’s much better to be safe than sorry. Once you’ve got rid of the junk, backup your Mac either with Time Machine or a tool that can make a bootable clone. It’s really easy to use, quick and can free up tens of gigabytes of space. My favorite way to get rid of junk files is to use CleanMyMac X.

Installing a new OS over that lot is not a good idea it’s like layering paint over paint – at some point, you have to sand it down and start again. They consist of cache files, temporary files that were never deleted, and all sorts of other data macOS stores on your Mac and you’ll never need again. Clean your Mac before you upgradeīefore we get started, if you’re planning to upgrade to macOS Catalina from High Sierra, you likely have lots of files on your Mac that you don’t need. Let’s compare macOS Catalina with macOS High Sierra. You get all the improvements that Mojave users get, plus all the benefits of upgrading from High Sierra to Mojave. But what if you’re still running macOS High Sierra? Well, the news then it is even better. Most coverage of macOS Catalina focuses on the improvements since Mojave, its immediate predecessor. But to help you do it all by yourself, we’ve gathered our best ideas and solutions below.įeatures described in this article refer to the MacPaw site version of CleanMyMac X. So here’s a tip for you: Download CleanMyMac to quickly solve some of the issues mentioned in this article.

Macos high sierra upgrade to catalina